				<li><span id="system:group:code1" class="folder">system1</span>
					<ul>
						<li><span id="system:linux:linux1" class="file">Linux1</span></li>
						<li><span id="system:windows:windows1" class="file">Windows1</span></li>
						<li><span id="system:db:db1" class="file">DB1</span></li>
					</ul>
				</li>
				<li><span id="system:group:code2" class="folder">system2</span>
					<ul>
						<li><span id="system:linux:linux2" class="file">Linux2</span></li>
						<li><span id="system:windows:windows2" class="file">Windows2</span></li>
						<li><span id="system:db:db2" class="file">DB2</span></li>
					</ul>
				</li>